Wanda,

What utility are you using to monitor the %busy for the tape scsi bus on
AIX?  That would be very helpful to me to be able to see that
information.

Thanks! 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Prather, Wanda
Sent: Monday, November 14, 2005 12:52 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Tape monitoring? was: Re: Platform change to Windows?

Allen,

I don't actually have anything I LIKE on any platform except the
mainframe!

On AIX, at least I can see %busy on the SCSI bus that has tape - I can
tell something is going on, or not. 

And on Windows I can get %idle time on disk, but NOTHING on tape.

Any suggestions?

Wanda



-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Allen S. Rout
Sent: Friday, November 11, 2005 11:40 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Tape monitoring? was: Re: Platform change to Windows?


==> On Wed, 9 Nov 2005 16:38:47 -0500, "Prather, Wanda"
<Wanda.Prather AT JHUAPL DOT EDU> said:

> I've talked with people from Tivoli and from Microsoft and from SHARE;

> there is NO instrumentation in Windows that will let you monitor what
is
> going on over a non-disk I/O bus.  You hook tape to a Windows host,
and
> it's a mystery what happens.   When I'm doing tape-to-tape operations,
I
> can't tell WHERE the bottleneck is.  I don't have a really good notion

> of how much data you can push through a Windows box, given you have 
> multiple HBA's/SCSI connections, but there is only 1 or 2 internal 
> buses.  I can't tell how much memory is being used for the TAPE I/O 
> buffers, or if that is an issue.


Wanda, could I elicit a short summary of how you like to monitor tape
bandwidth?  What tools do you like, &c?

- Allen S. Rout